Kindle users warned to update their device by Tuesday or face losing books and Internet

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SANTA MONICA, CA - SEPTEMBER 6: A $69 Kindle reading device is seen at a press conference on September 6, 2012 in Santa Monica, California. Amazon unveiled the Kindle Paperwhite and the Kindle Fire HD in 7 and 8.9-inch sizes. (Photo by David McNew/Getty Images)

"Your Kindle is unable to connect at this time. Please make sure you are within wireless range and try again. If the problem persists, please restart your Kindle from the Menu in Settings and try again."

The update is required for most models purchased between 2007 and 2012.

The company website provides instructions on how to manually install the software if the device no longer connects to the Internet.